C. Install the Ceiling Firestop

A ceiling firestop MUST be used between floors and attics.

Frame opening 9 in. x 9 in. (229 mm x 229 mm) whenever the vent penetrates a ceiling/ floor (see Figure 6.3).

Frame the area with the same sized lumber as used in ceiling/floor joist.

The ceiling firestop may be installed above or below the ceiling joists when installed with a attic insulation shield. It must be under joists between floors that are not insulated. Refer to Figure 6.4.

Secure with three fasteners on each side.

WARNING! Risk of Fire! DO NOT pack insu- lation around the vent. Insulation must be kept back from the pipe to prevent overheating.

 

 

ATTIC ABOVE

 

 

A

 

 

A

 

PIPE

A

 

SLP

9 in. (229 mm)

Figure 8.3

Installing Ceiling Firestop

 

 

 

 

 

INSTALL ATTIC INSULATION SHIELDS

 

 

 

 

BEFORE OR AFTER INSTALLATION OF VENT SYSTEM

 

 

 

 

 

3 FASTENERS

 

 

 

 

 

PER SIDE

 

 

 

CEILING FIRESTOP

CEILING FIRESTOP

 

 

 

INSTALLED BELOW CEILING

INSTALLED ABOVE CEILING

 

 

 

Figure 8.4

Installing the Attic Shield

32

Heatilator

GDST3831I

2127-900 Rev. F •

10/08

Page 32
Image 32
Hearth and Home Technologies GDST3831I owner manual Install the Ceiling Firestop, Pipe SLP